feat(skills): add wellarchitected.github.com content to cicd-github-actions-ops

## Summary

Add references and patterns from https://wellarchitected.github.com to the `cicd-github-actions-ops` skill.

## Rationale

The GitHub Well-Architected framework provides operational best practices for GitHub Actions that would enhance the review and debugging guidance in this skill.

## Scope

- Add wellarchitected.github.com as a reference
- Incorporate relevant operational patterns
- Add framework-based checklists for workflow review

## Related Skills

This is part of a broader effort to add wellarchitected.github.com content to:
- cicd-github-actions-dev
- cicd-github-actions-ops (this issue)
- github-actions-dev
- github-app-dev
- iac-terraform-modules-eng
- iac-terraform-orchestration-ops